Tube-rolling mill.



PATENTED APR. 23, 1907..

2 BHEETBSHEET 1.

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No. 851,435. PATENTED APR. 23, 1907.

J. G. PRY. TUBE ROLLING MILL. PPPPPPPPPPPPPPPPP 0T.2, 1903.

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JOHN PRY, OF SHELBY, OHIO.

TUBE-ROLLING MlLL.

Specification, of Letters Patent.

Patented April 23, 1907.

Applieationfiledoctober2,1903. SerialNo. 175.502.

To all whom it may concern Be it known that I, JOHN C. PR1, a citizen ofthe United States of America, and a resident of Shelby, in the county ofRichland and State of Ohio, have invented certain new and usefulImprovements in Tube-Rolb.

ing Mills. of which thefollowing is a specifi cation.

My invention relates to the manufacture of seamless drawn tubing and isadapted to bemused in connection with a tube rolling m The object of myimprovement is to provide a means for supporting, guiding and bracingthemandrel rod when the tube or billet is being rolled over the mandrelor ug'. t is well known that in rolling seamless tubing over the mandrelor plug the mandrel is subjected at times to more or less stress orstrain, causing it to bend or buckle which will result ordinarily in adefective tube. It is necessary in order to prevent and overcome thestrain, to provide a guide that will support and brace the mandrel andkeep it in perfect alinement with the grooves in the rolling mill whichcoincide with the grooves provided in the guide. The groove in the guideis made wider than the corresponding roove in the rolling mill, topermit the mandrel and the tube which is drawn over it to move freelyin'the guide. in rolling tubes of various sizes it is necessary tosupport the mandrel at difl'erent'points of its length to obviate thetendency of buckling or bending as stated. It is import ant to provide aguide that will permit the tube to move over the mandrel and passthrough the guides freely, and at the same time obviate the tendency ofthe mandrel to buckle or bend when subjected to the stress or strain, towhich the mandrel 0r phi is subjected, which is communicated to tiemandrel rod causing it to vibrate and at times lift up, which results inl throwing the mandrel rod out of the yoke.

A further object of my invention is to provide a device that willsupport and guide either long or short rods, making it practical to rolltubes of varying lengths and of different sizes and gages, whichconsiderably re duces the amount of labor that it is now nec essary toperform without its use. It wlll also be noted that the;guides areconstructed 1 in such a manner as w .provide the operator with easyaccess to the mandrel when it is desired to remove the tube from themandrel ;"11B1I1g in rolling the tubes. It wil and pass it through thenext groove in the rolling mill, or remove it therefrom when the tube isfinished. This is important as it greatly increases the capacity of therolling mill, as the tubes can be removed from the mandrel with greaterfacility.

I attain these and other objects by the mechanism illustrated in theaccompanying drawing, in which,

Figure l is a longitudinal top plan View of my device showing it mountedon longitudinal supports which are attached to the housings of a rollingmill. Fig. 2 is a View in side elevation showing the draw bars attachedto a series of angular leversor bolts. F i 8 is an end view of onesection of my cevice showing the position of the lever when it is inmesh with the notches provided in the up per portion of the guide,(seeFig. 4). It also shows a side view of the bracket upon which themandrel guides are mounted. Fig. 4 is a side view of the mandrel guideprovided with a hooked portion. This view is taken on the line lV-IV ofFig. 3 and shows the lever in contact with the notched or hooked portionof the uide. Fig. 5 is a side view of the mandrel guide taken throughthe line III-- tion removed.

In constructing my device I provide two longitudinal supports 1 andsecurely attach them to the housings 2 of an ordinary rolling mill. Ayoke 3 having suitable apertures provided therein and adapted toadjustably fit the free ends of the supports 1, is provided and adaptedto be adjustably mounted on the supports so as to adjust it to conformto the length of the tube it is desired to roll.

One end of the mandrel rod 4 is supported in suitable apertures providedin the plate 3 carried. by the yoke 3, The opposite end 4 of the rod &has the mandrel lu 7 attached thereto when the operation 0 ro lling isbeing performed, and is supported in the groove of the rolling millwhich corresponds with' the aperture providedin the plate. A series ofbrackets 5 are ad justably secured to the supports 1 throughthe mediumof the bearings 6. The bearings are shown in Fig. 3 and are III of Fig.3, with the notched or'hooked pormade in sections and clamped togetherby any "ordinary clamping means which holds them in frictional eontavtwith the supports 1. This provides a means of itd1ll5t111g the bracketson the supports to conform to the length of the mandrel red the operatoris be noted that each bracket can be adjusted independently of theremaining brackets so as to en 1 port the mandrel at any point desired.T e

V T he upper portion of the guide or support is forming the guides vaprovi ed with a series of grooves 7 avin the lower portions or wallsthereof adapted to support the mandrel rod, with the sides rooveadapted. to guide the mandrel'and ice it in alinement with the groove ofthe ro ling mill when it is being subjected to the stress or strain ofthe rolling operation. The (grooves 7- provided in the in wi th toprovide, for the different sizes mandrel rods,-and are made Wider thanthe corresponding grooves in the rolling mill, the purpose of which isto rovide a means of permitting the tube to. e drawn over the mandrelfreely. The tendency of the mandrel rod to vibrate or lift up isobviated as the mandrel is brought in" contact with either side ofthe'grooves. and-is thereby kept in perfect alinement with the grooveprovided in the rolling mill. 7 The lower-Wall 7 of the groove 7 is madeconvex in form to ermit the tube to move over its surface reely whenitis being drawn or rolled over the mandrel or plug 7 j I The form ofmandrel guide shown in Fig. is the one I prefer to use, but I have foundit desirable in rolling tubes small in diameter or of'great length touse the form of the mandrel guide shown in Fig. 4. In using this form ofmandrel guide and sup ort a series of levers 8 having one end turne atan angle with the body portion is pivoted to the guides 7 by means ofbolts 9. A draw bar 11, having a series of apertures coinciding with theapertures in the turned portions of the levers,

' is provided and adapted to connect the levers together whereby" thelevers can be drawn in or out of contact with the notched. or' hookedortions -1() of the mandrel rod guides simu taneously, permitting theoperator to remove the tube from the mandrel preparatory to placing itin the next groove of the rolling mill. When the billet or tube is beingrolled over the lug or rnandrel the tendency of the mandrel rod tovibrate because of the strain that it is being subjected. to by therollin process, is obviated and all danger of buckling or bendingremoved as the tube is brought in contact with the lower portion of thean ular levers and held in place. The dotte the position of the leverswhen they are out of contact with the notched portions of the mandrelguides. It'will be noted that my device can be used successfully with orwithout the notched or hooked portions of the mandrel guides. My deviceis designed to be used in CODJULHQIJIOII with the ordinary tube rollingmill and is mounted on the frame work as described.

lines (see Fig. 1) show i ln'performing the function of rolling thetubes the billet is rolled over the plug or "mandrel 7 which is securedto one end of the mandrel rod. It will'be observedthat the plug is madelarger in diameter than the mandrel to which It is secured so that theinner periphery of the tube which is being drawn 6 are provided in thebrackets 5 through which the bolts 2 pass, affording. facilities ofraising or lowering the mandrel guide or supports, bringing the lowerportion of the groove in contact with the mandrel as deauLlDed. When theform of the mandrel lde (shown in Fig. 5) is being used and it is vesired to remove the tube from the mandrel rod-the operator pulls thedraw bar toward him andit beingattached to the angular levers, they aredrawn into the position shown by the dotted line E. This leaves theupper portion of the groove 7 without obstruction permitting the mandrelrod to be taken out and the tube removed therefrom.-

To briefly state the operation, one end of thebillet is inserted in oneof the passes between the rolls and forced over the mandrel rods beingcarried through. the guides in alinement therewith, after which themandrel rod is drawn out through the forward end of the Slight changescan be made in the form or construction of my device without deviatingfrbm the principle involved in my invention.

As for instance when it is desired to use the mandrel support or guide,the form shown in Fig. 4 can be used without the hooked portionbyproviding apertures 12 in the upper portion thereof and using a straightbar.

The bracket 5 or bearings shown in Fig. 3 can be made as shown that isto say, by roviding each crown of the convened wa s of the guides withcountersunk apertures 13 adapted to receive the bolts 0 or otherfastening means which register With and are received in apertures formedin the brackets 55, the heads of the bolts constituting the crown of theconvex walls, or the brackets may have the guides formed integraltherewith.

Having fully described my invention, what I desire to secure by LettersPatent is- 1. A mandrel guide or support for tube rolling mills,composed of a series of mandrel ides or supports mounted on a suitableame-work and having notches provided in the upper portion thereof,brackets secured to said frame-Work, a series of levers pivotallyattached to said brackets and/adapted to mesh with said notches providedin the upper portion of the mandrel guide. V l

2. A mandrel guide or 7 support for tube rolling mills, having a seriesof brackets attached to the frame-work, a pluralit of mandrel guidessecurely attached to said brackets, bars ivotally secured to saidbrackets, whereby t e body portion is made to register with a series ofnotches providedin the up er portion of the mandrel support, a draw-garhaving a series of apertures'provided therein, whereby the levers areconnected together, roviding a means of releasing the levers om contactwith the notches whereby'the tubes can be removed from the mandrel, substantially as and for the purpose set forth.

3. The combination with a suitablesupport, of a grooved guide mountedthereon, the walls of the grooves being laterally recessed and meansreceivable in the recesses for closing the upper open ends of thegrooves.

4. The combination with a suitable support, ofa grooved uide blockmounted thereon, the walls of the grooves being apertured and a barremovably received in the endson the block a tures and means connectedto one end of the apertures and extending across the upper ends of thegrooves to close the latter.

5. The combination with a suitable support, of a grooved guide blockmounted thereon, the walls of the grooves being apertured, a barpivotally supported intermediate its 11 receivable in the aperbar formoving it into or out of the apertures.

' havin 6. The combination with a frame rolls havin passes therein, andmandrel rods supporte in an abutment on the frame, of a plurality ofopen guides in alinement with the passes adapted to support the entirepiece be- 1ng operated upon, and ada ted to permit the said piece beingremove laterally from the guides.

-7. The combination with a frame, rolls passes therein and mandrel rodssuporte 1n an abutment at one end of the rame, of a pluralit of openguides adapted to support the man rels at intervals throughout t eirlength and which admit of the tubes formed being removed laterally fromthe guides.

8. The combination wi th a frame, rolls and mandrel rods, of guides inalinement with the asses of the rolls, the height ofeach guide beinggreater than the distance from'the bot tom of its pass to the horizontalplane of the widest portion of the pass, the guide being constructed andarranged to admit of transverse movement of the piece being operatedupon from its position in the guides.

Signed at Mansfield, 0. this 25 day of Sept,

: JOHN C.-PRY.

Witnesses:

EDITH OLINE JOHN H. -Ooss.

